Lamp ring



E. 0. SEITZ.

LAMP RING.

APPLICATION FILED OCT. 8. 1921.

Patented Nov. 7, 1922.

ERNEST O. SEITZ, 0E? DETRDET, I IIICHIEHKH, T9 C. Elli.

. CI-IIGJhhT, A CORPQEATION 01? :llTIOJr e111? CGMPANY,

rel-"in.

rarer nine.

Application filed October's, 1921. Serial No. 506,250.

To all ra/lowv it may concern; p

Be it lrnown that. 1, Banner O. Snrrz, a citizen of the United Statesof America, uling' at Detroit, inthe county of Wayne and iii-Late of Michigan, have invented certain new and useful Improvements in Lamp lrtin i, of waichthe :followingis a specification, reference being accompanying drawings. a I

The'invention relates to rings used for the mountingxoi the lens of lamps and in connection therewith constituting the removable lainp front or door. Such rings are g irovided with a portionfor bearing against the margin of the lens and also with a liar re for engagement with the lamp body and provided with securing means usually locked or unlocked by a rotational movement. The outer surface of the ring is formed with an ornamental finish of enamel or nickel-plated, but the inner surface and locking parts are better proteetedbyzinc,

galvanizing or other rust-pIuooiin t: treat-y nient. l l

"it is the object of the present invention to obtain a construction ofring in'which the inner portion including the locking mechanisrri. is separately formed and is readily attachable to the finished outer portion.

This permits of galvanizing or otherwise rust-proofingthe inner portion and of ornamentally fini hing the outer portion in any desired manner while the two parts are detached and oi subsequently assembling the two. It also permits ofrejection of a defective part without discarding the whole structure. With these objects in View the invention consists in the novel construction hereinafter set' forth.

in the drawings:

Figure 1. is a sectional elevation otthe ring";

igure 2 is elevation partly in section showing the joint portion of the inner ring; Tigure 3 is a section. through the ioint i the inner ring;

Figure 4 is a sectional perspective view of the assembled rings; and

P igure 5 is a sectional side elevation.

A is the outer ring formed of pressed sheet metal and of any desired construction, but as shown having the cylindrical peripheral flange with an inturned rear portion and the radially inwardly extending front portion D. E is the inner had therein to the ru; desect in the outer finish the whole strucare fashioned portion of the ring which when assembled with the outer ring, has a portion F hearing against the inner surface of said outer ring, a portion G parallel to but spaced from said inner 'll1g' t radially extending portion H connecting the portions F and (I and a radially inwardly extending portion l which forms a retainer for the gasket which forms the sealin "oint with thelens.

The ring ii) is further provided with the lugs J attached thereto which are radially slotted to engage cooperating locking pins o thelainp body. l

l Vith'the construction of ring E as thus far described, it would be impossible to engage the samewith the outer ringafter the completion of the latter, for the reason that the inturned flange C on the ring A is of a diameter less than that of the portion F of the ring E. Consequently it has been the practice inthepa-st to turn in the flange C subseuuentto the assembly of the rings A and E but this necessitates the niclrle plating or other finishing ofthe outer after assembly; Also, where there is a ture is rejected, not'be detached.

To permit of completely finishing the u' and the outer rings while separate 10in each other and subsequently assemiuc' the same. the inner E split and the portionson opposite sides of the split are so fashioned as to forni' an interlocking engagement with eachother. Pref erably a continuous ring is first formed for the inner portion can "which is subsequently severed and the portions on oppositesides of the severing point to form projecting tongues h. and K. These are laterally offset so as to each other upon opposite sides and in this manner to hold the two end portions from misalignment. The tongues 1 formed on the portion Gr of the ring l and as this portion is spaced from the outer ring A it may be circiunierentially expanded by the use of a suitable tool so as to engage or disengage the tongues K'and K from each other.

With the construction as described, when the rings A. and E are to he assembled, the

ring has the end portions thereof over- As the inner ring is subject to a rotary thrust or torque during the locking or unlocking movement, it is essential that it should be locked to the outer ring. This I accomplish in a simple manner by striking inward from the outer ring a tongue L which engages a notch M in the inner ring. The tongue and notch are preferably located at the bottom of the ring when mounted upon the lamp and the aperture N formed by the striking in of the tongue performs the further function'of a drain hole for the escape of condensation.

\Vhat I claim as my invention is:

1. In a lamp, an outer ring and an inner split ring extending clear across the inner surface thereof and forming an attachable lining and strengthening rib therefor.

2. In a lamp, an outer ring having int-urned flanges on opposite sides of a central portion and an inner ring forming a lining having a portion bearing against the port-ion of said outer ring between said flanges, said inner ring being split to permit of first collapsing and then expanding for engagement with said outer ring, and means for locking the portions on opposite sides of. the split in alignment.

3. In a. lamp, the combination with an outer ring having radially inwardly extendingfianges on opposite sides of a central portion, of an inner lining ring having a portion for engaging said central portion of the outer ring, said inner ring being split to permit of. first collapsing and then expanding into engagement with said outer ring, and interlocking tongues on the portions of said inner ring on opposite sides of the split for holding the same in alignment.

4. In a lamp. an outer ring and an inner ring in engagement with each other, and means "for locking said rings from relative rotation comprising a tongue struck out from one and engaging a notch in the other, the space formed by the striking out of said tongue being located in the bottom portion of the ring and constituting a drainage aperture for the ring.

I 5. In a lamp, an outer ring and an inner ring in engagement with each other, said inner ring having a flange along one edge adapted to lie flush with said outer ring, means for locking said rings from relative rotation comprising a tongue struck inward from said outer ring in the bottom portion thereof and engaging a notch in said flange, said notch together with the aperture formed by the striking out of said tongue constituting a drainage aperture for the ring.

6. In a lamp, an outer ring comprising a wide flat central portion having inturned flanges at both edges thereof, an inner ring forming a lining and comprising a wide flat central portion adapted to lie parallel with said first mentioned central portion and provided with flanges thereon for holding said: central body portion spaced from each other, said inner ring being split to permit of its insertion between the flanges of said outer ring and means for locking the abutting ends of said split ring comprising a pair of tongues formed on each end adapted to engage each other on opposite sides of the split.

'Iln a lamp, an outer ring and an inner ring in engagement with each other, and

means for locking said rings from relative rotation comprising a plurality of indentations upon one of said rings and surfaces upon the other ring corresponding to the contour of said indentations and adapted to snugly fit therein and a tongue struck up from the lower edge of the outer ring engaging a notch in the other, the space formed by the striking out of said tongue being located in the bottom portion of the ring and constituting a drainage aperture therefor.

- In testimony whereot- I afiix my signature.

ERNEST o. sErrz. 

